#include <iostream>
#include "bigNumber.h"
int main()
{
	num a, b;
	char s;
	std::cin >> a >> s >> b;
	switch (s)
	{
	case '+':
		std::cout << a + b << std::endl; break;
	case '-':
		std::cout << a - b << std::endl; break;
	case '*':
		std::cout << a*b << std::endl; break;
	case '/':
		std::cout << a / b << std::endl; break;
	default:
		break;
	}
	return 0;
}